<template>
	<view>
		<view class="search-box">
		  <!-- 使用 uni-ui 提供的搜索组件 -->
		  <uni-search-bar @input="inputSearch" :radius="100" cancelButton="none" :focus="true" ></uni-search-bar>
		</view>
		
		<view class="history-box"  v-if="!searchResList.length > 0">
		  <!-- 标题区域 -->
		  <view class="history-title">
		    <text>搜索历史</text>
		    <uni-icons type="trash" size="17" @click="cleanHistory"></uni-icons>
		  </view>
		  <!-- 列表区域 -->
		  <view class="history-list">
		    <view class="txt"  :text="item" v-for="(item, i) in historyList" :key="i" @click="gotoGoodsList(item)">{{item}}</view>
		  </view>
		</view>
		<view class="sugg-list" v-else>
		  <view class="sugg-item" v-for="(item, i) in searchResList" :key="i" @click="gotoDetail(item.goods_id)">
		    <view class="goods-name">{{item.goods_name}}</view>
		    <uni-icons type="arrowright" size="16"></uni-icons>
		  </view>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				  show: true,
				    showSync: true,
				    searchVal: "",
					  
					    delay: null,
					    // 搜索关键词
					    kw: '',
						historyList:[],
					searchResList:[]
			};
		},
		onLoad(){
			this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]')
		},
		methods:{
			inputSearch(e) {
				
				if(this.delay) clearTimeout(this.delay)
			    
			      // 重新启动一个延时器，并把 timerId 赋值给 this.timer
			      this.delay = setTimeout(() => {
			        // 如果 500 毫秒内，没有触发新的输入事件，则为搜索关键词赋值
					
			        this.kw = e
					
			        this.getSearchList()
			      }, 500)
			  },
			  // 根据搜索关键词，搜索商品建议列表
			  async getSearchList() {
			    // 判断关键词是否为空
			    if (this.kw === '') {
			      this.searchResList = []
			      return
			    }
			    // 发起请求，获取搜索建议列表
			    const { data: res } = await uni.$http.get('/api/public/v1/goods/qsearch', { query: this.kw })
			    if (res.meta.status !== 200) return uni.$showMsg()
			    this.searchResList = res.message
				this.saveSearchHistory()
			  },
			  
			  gotoDetail(goods_id) {
			    uni.navigateTo({
			      // 指定详情页面的 URL 地址，并传递 goods_id 参数
			      url: '/subpkg/goods_detail/goods_detail?goods_id=' + goods_id
			    })
			  },
			  
			  saveSearchHistory() {
				  if(this.historyList.length > 0){
					  this.historyList.some((item,index)=>{
						  if(this.kw === item){
							  this.historyList.splice(index,1)
							  return
						  }
					  })
				  }
			      
			      this.historyList.unshift(this.kw)
				   uni.setStorageSync('kw', JSON.stringify(this.historyList))
			    },
				
				// 点击跳转到商品列表页面
				gotoGoodsList(kw) {
				  uni.navigateTo({
				    url: '/subpkg/goods_list/goods_list?query=' + kw
				  })
				},
				cleanHistory() {
				  // 清空 data 中保存的搜索历史
				  this.historyList = []
				  // 清空本地存储中记录的搜索历史
				  uni.setStorageSync('kw', '[]')
				}
		}
	}
</script>

<style lang="scss" scoped>
.uni-searchbar {
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  flex-direction: row;
  position: relative;
  padding: 16rpx;
  /* 将默认的 #FFFFFF 改为 #C00000 */
  background-color: #c00000;
}
.search-box {
  position: sticky;
  top: 0;
  z-index: 999;
  background-color: #d81e06;
}
.sugg-list {
  padding: 0 5px;

  .sugg-item {
    font-size: 12px;
    padding: 13px 0;
    border-bottom: 1px solid #efefef;
    display: flex;
    align-items: center;
    justify-content: space-between;

    .goods-name {
      // 文字不允许换行（单行文本）
      white-space: nowrap;
      // 溢出部分隐藏
      overflow: hidden;
      // 文本溢出后，使用 ... 代替
      text-overflow: ellipsis;
      margin-right: 3px;
    }
  }
}

.history-box {
  padding: 0 5px;

  .history-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 40px;
    font-size: 13px;
    border-bottom: 1px solid #efefef;
  }

  .history-list {
    display: flex;
    flex-wrap: wrap;

    .txt {
		display: inline-block;
      margin-top: 5px !important; 
      margin-right: 5px;
    }
  }
}
</style>
